# CORS Unlocker

> Enable cross-origin requests without proxy servers. Eliminate infrastructure costs for developers calling third-party APIs. One-click CORS activation with smart rule management.

Canonical page: [https://chrome-stats.com/d/cors-unlocker](https://chrome-stats.com/d/cors-unlocker)

## Overview

- **ID:** `cors-unlocker`
- **Platform:** Firefox
- **Type:** Firefox add-on
- **Status:** Available
- **Publisher:** Saiya
- **Category:** web-development
- **Daily users:** 19
- **Version:** 1.1.0
- **Last updated:** 2025-06-27
- **First published:** 2025-06-22
- **Size:** 111 KB
- **Data as of:** 2026-09-10
- **Store listing:** [Firefox Add-ons Store](https://addons.mozilla.org/firefox/addon/cors-unlocker/)
- **Website:** [https://cors.forth.ink/](https://cors.forth.ink/)
- **Privacy policy:** [https://addons.mozilla.org/firefox/addon/cors-unlocker/privacy/](https://addons.mozilla.org/firefox/addon/cors-unlocker/privacy/)

## Description

Eliminate Proxy Server Costs - Enable CORS Directly in Firefox

Stop paying for expensive proxy servers just to bypass CORS restrictions. CORS Unlocker enables cross-origin requests directly in your Firefox browser, saving developers hundreds of dollars annually.

🎯 Why Choose CORS Unlocker:

- Save $240-2400+ annually on server costs
- One-click CORS activation for any domain
- Intelligent rule management and auto-cleanup
- Zero configuration required
- Open source transparency

👨‍💻 Ideal Use Cases:

- Company internal tools and admin panels
- API testing and rapid prototyping
- Educational coding projects
- Personal web applications
- Startup minimum viable products

🔧 Developer Features:

- NPM package for seamless integration
- Automatic extension detection
- User-friendly installation prompts
- Local rule storage and management
- Smart cleanup of unused rules

📋 How to Use:

1. Install CORS Unlocker extension
2. Navigate to your web application
3. Click the extension icon
4. Enable CORS for current domain
5. Make cross-origin API calls directly

🔒 Privacy First:

- All processing happens locally
- No external data transmission
- Rules stored on your device only
- Full source code available on GitHub

Compatible with desktop Firefox only. Mobile browsers not supported due to extension API limitations.

Transform your development workflow and eliminate unnecessary infrastructure costs today!

## Rankings

- #25,227 — Overall
- #192 — cost
- #204 — course

## Permissions and access

### Permissions

- `declarativeNetRequest`
- `declarativeNetRequestWithHostAccess`
- `tabs`
- `storage`

### Host permissions

- `<all_urls>`

### Content script matches

- `*.forth.ink`

## Safety

- **Risk impact:** High risk impact
- **Risk likelihood:** Moderate risk likelihood

### Analysis details

- Grants access to browser tabs, which can be used to track user browsing habits and history, presenting a privacy concern.
- This extension has low user count. Unpopular extensions may not be stable or safe.

> Some risk analysis details are omitted from this free response. [Upgrade to view the full analysis](https://chrome-stats.com/pricing).

## Similar extensions and apps

- [CORS Unbound](https://chrome-stats.com/d/cors-unbound) — 20 users
- [CORS Unblock](https://chrome-stats.com/d/cors-unblock2) — 89 users, 5.00 / 5
- [CORS Everywhere](https://chrome-stats.com/d/cors-everywhere) — 20,905 users, 4.13 / 5
- [Restfox CORS Helper](https://chrome-stats.com/d/restfox-cors-helper) — 173 users, 5.00 / 5
- [Testfully](https://chrome-stats.com/d/testfully) — 4 users
- [CORS Unblock](https://chrome-stats.com/d/cors-unblock) — 6,354 users, 3.74 / 5
- [Moesif Origin & CORS Changer](https://chrome-stats.com/d/moesif-origin-cors-changer1) — 492 users, 3.00 / 5
- [Corser](https://chrome-stats.com/d/corser) — 31 users, 3.00 / 5
- [Cross Domain - CORS](https://chrome-stats.com/d/cross-domain-cors) — 1,022 users, 2.71 / 5
- [Allow CORS: Access-Control-Allow-Origin](https://chrome-stats.com/d/access-control-allow-origin) — 8,860 users, 2.68 / 5
- [CORS dev tool](https://chrome-stats.com/d/cors-dev-tool) — 12 users, 3.67 / 5
- [Custom CORS Control](https://chrome-stats.com/d/custom-cors-control) — 6 users

---

Source: [Chrome-Stats](https://chrome-stats.com/d/cors-unlocker)